These may seem like simple questions, but here goes.
How do you layout your grip throat?
Center of radius @ center of bow?
Do you use same radius above and below centerline?
Does diameter of throat radius effect accuracy/torque?
I've always used a tighter radius than the layout pictured. My thought is that a more open throat will reduce issues with torquing, but may make it harder to get a consistent grip.
(http://i.imgur.com/kuaYL3D.jpg)
*How do you layout your grip throat?
Pretty much like you have there, shelf starts at 1.125" above centerline.
*Center of radius @ center of bow?
Yes
*Do you use same radius above and below centerline?
About like you drew, the bottom comes out of radius pretty quick.
*Does diameter of throat radius effect
accuracy/torque?
Doesn't seem to to me anyway. The bow naturally goes down in your hand either way.
I always use I think a 1 1/4" dia. circle for my throat, that what most Oly grips are so I figure I can't go wrong.